Well I can't compare thr JB+ to SSTT because I never had the other. My car was bone stock for a year with few pulls to 140mph. When I did the 150mph pulls with the JB+ at 90% it felt much quicker than stock. The pull from 60 to 120-140 is much stronger than stock, but I can't really compare it to the sstt since I never had it. The highway pulls are much stronger, and it keeps pulling strong all the way up. The defult setting might not be that impressive, but 75% and up is way better.
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13 Mini Cooper S
08 E92 335i (SOLD)
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